PersistentWindows/Ninjacrab.PersistentWindows.Solution/Ninjacrab.PersistentWindows.WpfShell/App.xaml.cs

using System.Windows;

namespace Ninjacrab.PersistentWindows.WpfShell
{
    /// <summary>
    /// Interaction logic for App.xaml
    /// </summary>
    public partial class App : Application
    {
        protected override void OnStartup(StartupEventArgs e)
        {
            base.OnStartup(e);

            new MainWindow().Show();
            new PersistentWindowProcessor().Start();
        }
    }
}